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drm/gpuva: Add drm_gpuva_for_each_op_reverse

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Add a helper to walk op list in reverse. Xe will make use of this when
unwinding GPUVA operations.

v2: (Rodrigo) reword commit message

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This commit is contained in:
Matthew Brost 2023-08-31 07:58:44 -07:00 committed by Rodrigo Vivi
parent 5ef091fc32
commit bbd52b6153
1 changed files with 10 additions and 0 deletions
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10
include/drm/drm_gpuvm.h
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@ -1007,6 +1007,16 @@ struct drm_gpuva_ops {
#define drm_gpuva_for_each_op_from_reverse(op, ops) \
list_for_each_entry_from_reverse(op, &(ops)->list, entry)
/**
* drm_gpuva_for_each_op_reverse - iterator to walk over &drm_gpuva_ops in reverse
* @op: &drm_gpuva_op to assign in each iteration step
* @ops: &drm_gpuva_ops to walk
*
* This iterator walks over all ops within a given list of operations in reverse
*/
#define drm_gpuva_for_each_op_reverse(op, ops) \
list_for_each_entry_reverse(op, &(ops)->list, entry)
/**
* drm_gpuva_first_op() - returns the first &drm_gpuva_op from &drm_gpuva_ops
* @ops: the &drm_gpuva_ops to get the fist &drm_gpuva_op from